My CPE2+ is on the left side of my sink, so I put an extension hose on the drain pipe. This lets me dump to waste, or to a bottle as needed. If the drain is flooding when you pour in a chemical, you are pouring just a little too fast. Any process that is subject to serious contamination usually includes a rinse step. That should be cleaning your lift piping,
On the other hand, if you prefer the magnet base, go for it.